<template>
  <div id="app">
    <router-view/>
  </div>
</template>
<script>
export default {
  name: 'App',
  created () {
    //在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem("store") ) {
        this.$store.replaceState(Object.assign({}, this.$store.state,JSON.parse(sessionStorage.getItem("store"))))
    } 


    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload",()=>{
        sessionStorage.setItem("store",JSON.stringify(this.$store.state))
    })
  }
}
</script>

<style lang="less">
    *{
      margin: 0;
      padding: 0;
    }
      html,
    body, #app{
      height: 100%; 
    }
    .el-dialog__header{
      background-color:#eaeaea;
    }
</style>
